Impeoyed milling machine



VILLIAM H ELLIOT, OF NEW. YORK, N. Y. Leners Patent No. 65,802, ama JW 18, 1867,v

dlp dgrhulc refont in in igeseettrrs iueut mit mating pitt mi tlgeisame.

TO ALL WHOM IT MAY CONCERN: y

Be it known that I, WILLI-AM H, ELLIOT, of the city, county, and State of New York, have invented a new and improved Machine for Drilling Rocks, Ore, Ste.; and I do hereby declare that thevfollowing is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon. Similar letters of reference indicate the same'devices inl all the figures.T i

To enable others skilled in the arts to comprehend, make, and use my invention,.I will proceed to describe its nature, construction, and operation.

The nature of myinvention consists in connecting the crank of a rock-drilling machine tothe drill-spindle, by means of a powerful spring, supported in its place by a suitable carriage, which slides upon or with the spindle; in the employment, in Vconnection with suitable shoulders for a jar, of a spring which shall prevent theljar from taking e'ect, except when the drill sticks in the hole; in so employing the excess of motion in the drillspindle over that indicated by the length of the cranks, that it shall cause the machine to feed toward the ro: i: in proportion as the hole deepens, and in the employment of a peculiar pawl and rack for this purpose. It further consists in 4the use of a diagonal guide, which acts upon notches on the periphery of a collar or disk, which is attached to the drill-spindle, and in the employment of a windlass for raising and lowering the machine.4

Figure 1 is a front elevatiii of my improved drill.

Figure 2 is a side elevation of the same.

Figure 3 is a section of the vertical feed devices. t

n"` igurc 4 shows two methods of applying the diagonal guide to the disk.V

Figures and 6 s how another method of applying a diagonal guide to the disk.

a, frame of the machine-which supports the ily-wheel, and all the other parts of the machine that Vmore 'while it is in operation. Frame a slides vertically upon vertical bed-piece I). This gives to the machine the necessary feed motion.l On the back of this bed-piece there is a circular projection, c, which is fitted to a circular bed-piece, q', and is fastened to it by a central bolt. These serve as ajoint, which allows the machine lateral motiom'so as to point the drill to the right or left. The circular bcd-pieee c is fastened to or cast upon the shaft d, which has its bearings in stands d. This allows the machine to take an inclination forward or back. The stands 'dure tightened upon the shaft d by bolts t. The stands d are bolted to a platform, 1J, which, when used in deep cuts, is suspended by means of wire ropes or other adjustable supports, from or under a car, which rlns upon ways on or above the surface of thc-earth. Arm c projects from the bed-piece c', and supports a pivoted box, e, which serves asa bearing for screw c. Stand g is bolted to platform p, and supports on its upper end pivoted nut e, through which screw e passes. This screw is turned by means of crank f, to bring the machine to, and hold it at any required inclination, either forward or backward. Flywheel 71y is connected, by means of cranks h and connecting-rods t', with spindle-carriage 7c. This carriage has its bearings upon and moves vertically with the drill-spindle Z. The drill-spindle has its bearings on the frame a, at a', through which it slides freely. Collar m is fastened permanently to the spindle l. Between the collar m and the end of the carriage, both above and below, there arc strong spiral sprlugs, n and n, shown in section, so that the spindle can slide through carriage 7c only to the extent allowed by the springs. 0,'windlass, o crank, o rope for the purpose of raising the machine to clean the hole. u, feed-pawl, whichholdslthe frame from sliding down on bed piece b, until required to do so by thc advance of the drill. The pawl 1t holds upon the rack u', which is attached to bed-piece Z1, and is composed oi' a series of pings passed through the bed-piece at equal distances one above the othcr. m', diagonal plate, the edge of which catches into notches on the periphery of collar m. This plato is hinged to carriagcdc, and is held against collar m by spring m.

The operation of my improved rock-drill is as follows: When the machine is put in operation the carriage k receives a vertical motion, which is' limited by the -length of the crank, but Vthe drill-spindle slides freely through the carriage k, being supported in its relation to the carriage only by springs a and n. It has a motion considerably in excess of that given to the connecting-rods or indicated by the length of the crank. As the crank descends and passes the lower centre, the drill and drillaspindle, by their momentum, depress the spring az till the drill strikes the bottom of the hole. As the crank rises again and passes the upper centre, the upper spring n is compressed, which adds its force to the motion of the crank, while descending, and shoots the drill downward against the rock as an arrow is shot from a bow. As the hole deepens the spring n is more and more compressed at each revolution of the crank, till the collar m (see fig. strikes the tail n ofthe feed-pawl u, when the point a: is withdrawn from the rack u', and the machine slides down on the bed-piece c, till the point l." comes in contact with the pin below it, which, owing to its shape, slides out of the rack, forcing point a: into it again,so as to catch upon the next pin. In this way the machine is fed down as the hole deepens. The upper sides of points x and are so shaped that when the machine is drawn up by the windlass o, the pawl u passes easily over the pinsrof the rack u, vibrating rapidly, like the scapement of a clock. By depressing pawl u by the nger, the machine may be .let down after being raised, the pawl vibrating under the finger the same as when the machine was, drawn up. As the drill-spindle slides up and down in carriage k: the collar m moves vertically under the diagonal edge of plate on. This edge actsupon the notches on the periphery of the collar to revolve the drill-spindle. As the collar-descends the edge of the plate has no tendency to turn it, as it takes no effect upon the notches; but when the collar rises a notch catches upon the edge of the plate, and follows it, giving tothe drill a partial revolution at each upward motion of the crank. In case the drill sticks in the hole, as itY often does, whether drilling by hand or by machinery, the spindle-carriage continuing its upward motion, depressing spring n, till the shoulder n strikes the cellar m, and drives tl1e`drill and spindle upward with a heavy blow. A similar device, in some respects, is used in thc machinery for drilling oil wells, called4 a jar, which jars cach time the drill is raised; but this, by the employment of spring n, can onlyjar when the drill sticks in the hole, as the springr has sufficient strength, at other times, lto raise the drill and spindle, thus avoiding the wear andttear of machinery consequent upon jarring at each upward motion of the drill. I employ the collar os a convenient opposing shoulder on the drill-spindle, for the purpose of jarring the drill upward. The upper-end of the spindle might be enlarged, and the upper portion of the carriage allowed to strike it for the same purpose. Fig. 4 shows two diagonal plates operating upon the collar; one fastened to the carriage k, as shown in figs. land 2, the other fastened to the fra-ine a of the machine under the collar. The latter is a surer method than the former, as it acts upon the colla-r for the entire length of the motion of the spindle, while the former is operated only by the excess 0fthe'motion of the spindle over that of the carriage. Figs. 5 and ti show another method o1" giving to the drill the necessary revolution. In this case the collar m. has pins projecting from its periphery, Vwhich pass up and down in grooves s, v, und s', in a plate fastened -to the frame of the machine under the collar. One of the pins being in the upper end of the central groove o, in passing down raises spring t, and passes under it into the lower end of the groove. As it rises again the spring t guides it into the lateral groove s, bringing the next pin into the groove e, from which it passes into the upper end of central groeve t', and this operation is repeated at each revolution of the crank.

Having described my invention, what I claim, and desire to have'seeurcd to me by Letters Patent of the United States, is-

l. The carriage 7c, with springs n or u', in combination wit-h cranks 7L and drill-spindle I, when operating substantially as herein shownl and described. l

2. Projections n, and a corresponding collar on the drill-spindle, in combination with spring n., when employed substantially as and for the purpose herein specified.

3. llhe combination of crunk 7L', drill-spindle Z, and spring n, when employed as devices for producing excessief motion in the drill-spindle over that given to the connecting-rods by the cranks, which shall cause the machine to feed towards the rock, substantially as shown.

4. The pawl u and rack u', when acted upon by devices producing excess of motion in the drill-spindle over that of the eonnectingrods, for the purpose of feeding thev machine towards the rock, substantially as herein set forth.

5. Plate m-, with its diagonal edge, when acting on the notches on the collar m, to revolve the drill, when operated upon by devices producing excess of motion in the drill-spindle over that of the connecting-rods, substantially as shown and described.

WH. H. ELLIOT.

Witnesses LownLL ELLIOT, M. S, ELLIOT. 

